6. A buoy in the ocean is observed from the top of a 40-meter-high oil rig. The angle of depression from the top of the tower to the buoy is 6º. How far is the buoy from the base of the oil rig to the
nearest meter?

The answer to your question is: 1.78 gallons

Step-by-step explanation:

Data

1 gallon = 400 ft²

room = 8 ft x 20 ft x 7 ft

Process find the area of the 6 walls of the room

Area of the floor and ceiling

                                              A = base x width

                                              A = 20 x 8

                                             A = 160 ft²  x 2

                                             A = 320 ft²

Area of the walls

                                 Area = base x width

                                 Area = 2(20 x 7) + 2(7 x 8)

                                Area = 280 + 112

                                 Area = 392 ft²

Total area = 320 + 392 = 712 ft²

                                1 gallon 400 ft²

                                x              712 ft²

                                x = (712 x 1)/400

                                x = 1.78 gallons

I consider that Maria will paint both the floor and the ceiling